Name
UnixFromLine
Synopsis
The UnixFromLine
option replaces the pre-V8.7
$l
macro. It has two functions:
It defines the look of the five character "
From
" header line needed by UUCP software.It defines the format of the line that is used to separate one message from another in a file of many mail messages.
The forms of the UnixFromLine
option and
$l
macro are as follows:
Dlformat ← configuration file (V8.6 and earlier) O UnixFromLine=format ← configuration file (V8.7 and later) -OUnixFromLine=format ← command line (V8.7 and later) define(`confFROM_LINE',`format')← mc configuration (V8.7 and later)
The format
is of type
string. Under V8.6 and earlier there was no
default for format
, so the
$l
macro always had to be defined. Beginning with
V8.7, sendmail first checks to see if the
UnixFromLine
option was defined and uses that
value if it was. Otherwise, it checks to see whether the level of the
configuration file is 6 or less. If it is and if the
$l
macro was defined, it uses that value.
Otherwise, it uses the default:
From $g $d
Here, $g
($g) holds the
sender’s address relative to recipient, and
$d
($d) holds as its
value the current date in Unix ctime(3) format.
The UnixFromLine
option is not safe. If specified
from the command line, it can cause sendmail to
relinquish its special privileges.
UnixFromLine in UUCP software
UUCP software requires all messages to begin with a header line that looks like this:
From sender date remote from <host>
The sendmail program prefixes such a line ...
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